Each tutorial and workshop has a review activity associated with it to check your understanding of the concepts. You must score at least 70% to get the certificate.
If you attended a live workshop, your host should have provided a link to the activity at the end of the session. If you didn't get the link or lost track of it, just email uplibrary-ref@lonestar.edu and we'll send it to you.
You can also (or alternately, if you aren't able to attend a live workshop) work through one of the asynchronous tutorials.